Woodward 5441-645 from SAUL ELECTRIC | In Stock
1.5441-645 Product Overview
The Woodward 5441-645 belongs to the 505/505E series digital turbine controllers. It is a microprocessor-based control module designed for single-valve steam turbines,
including single extraction/admission systems or split-range actuator configurations.
The controller features a front panel Operator Control Panel (OCP) with a two-line, 24-character display and multi-function keypad, allowing easy on-site configuration and monitoring.
2. 5441-645 Technical Specifications and Parameters
| Parameter | Details |
|---|---|
| Power Supply | +24 VDC, approx. 1 A |
| I/O Outputs | Discrete Outputs: 8 Analog Outputs: 6 Actuator Outputs: 2 |
| Display / HMI | Two-line, 24-character LCD, with multi-function keypad |
| Dimensions | Approx. 14 × 11 × 4 in (35.6 × 27.9 × 10.2 cm) |
| Weight | Approx. 9.11 lbs (4.13 kg) |
| Operating Temperature | –4 to +140 °F (–20 to +60 °C) |
| Storage Temperature | –40 to +185 °F (–40 to +85 °C) |
| Humidity Standard | 95% RH at 20-55 °C for 48 hours without damage |
| Protection Class | Typically meets industrial dust and water protection standards |
| Communication Protocol | Supports Modbus, RS-232 / RS-422 serial interfaces |
3. Brand History
Woodward, Inc., founded in 1870 and headquartered in Fort Collins, Colorado, USA, is a global leader in energy control systems. The company has a long history of innovation in turbine control, engine management,
and power generation systems.
Woodward products are widely recognized for their reliability and precision in demanding industrial and power generation applications.
4. Applications in Industrial Automation
The 5441-645 plays a critical role in industrial automation and power generation environments:
- Steam Turbine Control: Manages startup, speed regulation, and extraction/admission control of steam turbines.
- Power Generation Systems: Used in power plants to regulate turbine-driven generators for stable frequency and load management.
- Compressor and Pump Drive Control: Ensures precise speed control for turbine-driven compressors and pumps.
- Process Industry Applications: Applied in chemical plants, refineries, and other industries requiring precise turbine operation.
- Safety and Protection Functions: Includes overspeed protection, critical speed avoidance, actuator travel limits, and event logging for operational safety.
Woodward controller speed controller
The PID controller maintains output so that there is zero error between the process variable and the setpoint/expected output through
closed-loop operation. PID uses three basic control behaviors, which will be explained below.
P-Controller:
The proportional or P-controller provides an output proportional to the current error e (t). It compares the expected value or set value
with the actual value or feedback process value. Multiply the obtained error by the proportionality constant to obtain the output. If the
error value is zero, the controller outputs zero.
The input-output of PID controller and the control implementation of PID controller
This controller requires bias or manual reset when used alone. This is because it has never reached a steady state. It provides stable
operation but always maintains a stable state of error. When the proportionality constant Kc increases, the response speed will also increase.
The input-output of PID controller and the control implementation of PID controller
I-Controller
Due to the constant deviation between the process variable and the set point in the p-controller, an I-controller is required, which provides the
necessary actions to eliminate steady-state errors. It integrates a period of error until the error value reaches zero. It maintains the value of zero
error for the final control device unchanged.
When negative errors occur, integral control will reduce its output. It limits the response speed and affects the stability of the system.
The response speed increases by reducing the integral gain Ki.
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